Baltic states are trying to decouple from Russia's electrical grid [1]. Latvia wants to move fast, Estonia is asking for more time. Concerningly, Estonia signed an agreement recently with Finland for a new submarine cable ("Estlink 3") to import more power (as Finland has an excess due to their new nuclear generator recently coming online, current interconnector runs maxed out most of the time at ~1GW). This infra may be at go forward risk from Russia, making the investment questionable at this time (unless the route and burial depth can sufficiently defend against a nation state threat actor).
Baltic States can disconnect already in case of an emergency. The infrastructure is ready, several tests have been conducted. Lithuania wanted to disconnect already, but Estonia pushed for more conservative approach: they want more synchronous condensers to handle a higher number of possible simultaneous failures in the system. It's a technical debate whether that is necessary (Lithuanian operator thinks it isn't): the probability of such failure is already very small, but the Estonian operator wants to reduce it a bit further.
[1] https://www.dw.com/en/baltic-states-seek-to-decouple-grid-fr...